Homework 4: Projectile Motion PROBLEM 1 A soagull is fying horizontally at a con

Question

Homework 4: Projectile Motion PROBLEM 1 A soagull is fying horizontally at a constant speed of 2.50 m/s when it drops a fry. The fry lands on the floor 1.90 seconds later. Just before the fry lands (ignoring air resistance) (a) what is the horizontal component of its velocity? (b) the vertical? (e) how do these quantities change if the seagull's speed is doubled? PROBLEM 2 A cork is launched from a bottle at an angle of 40° above the horizontal. If the cork moves 1.20 m in 1.10 seconds, what was its initial speed?

Explanation / Answer

Only one question can be posted as per chegg guidelines

1.

a)

Horizontal distance travelled

X=Voxt =2.5*1.9 =4.75 m

Since

X=[(Voxx+Vx)/2]t

4.75 =[(2.5+Vx)/2]*1.9

Vx=2.5 m/s

b)

From

Vy=Voy-gt =0-9.81*1.9

Vy=-18.64 m/s

c)

If the speed of the seagull doubled ,its horizontal velocity would double and vertical velocity remains constant

2.

Initial Horizontal and vertical component of velocities are

Vox =VoCos40

Voy=VoSIn40

Since Horizontal distance travelled

X=Voxt

1.2 =(VoCos40)*1.1

Vo=1.2/(1.1Cos40) =1.424 m/s

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